40406452 has 12 divisors (see below), whose sum is σ = 70756000. Its totient is φ = 20190456.

The previous prime is 40406441. The next prime is 40406459. The reversal of 40406452 is 25460404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40406459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9799 + ... + 13297.

Almost surely, 2^40406452 is an apocalyptic number.

It is an amenable number.

40406452 is a deficient number, since it is larger than the sum of its proper divisors (30349548).

40406452 is a wasteful number, since it uses less digits than its factorization.

40406452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6390 (or 6388 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 40406452 is about 6356.6069565453. The cubic root of 40406452 is about 343.1496597197.

Adding to 40406452 its reverse (25460404), we get a palindrome (65866856).

The spelling of 40406452 in words is "forty million, four hundred six thousand, four hundred fifty-two".